Preheat the oven to 180° C. Unroll the pastry and line a 22 cm round quiche tin with the pastry. Lightly prick the base and refrigerate to keep cool.
Whisk together the eggs, cream and milk. Season with salt and pepper and stir in the fresh thyme. Set aside.
Top the lined quiche pastry with ham and grated cheese, pour over the egg filling and bake in the preheated oven for 30 – 40 minutes, until the quiche is set and pastry cooked through.